Honestly, this is exactly what most tool websites are missing today. People usually come to a utility site for one quick task, not to go through signups, onboarding, or paywalls. The “Open → Do → Close” idea feels very user-focused. Personally, I leave instantly when a tool asks me to create an account for something basic or floods the page with ads and popups. What makes me come back the second time is speed, simplicity, and trust — when a tool works instantly, has a clean UI, and lets me finish my task without unnecessary friction, I remember it and use it again.